The effects of inclination and compounds angles of round holes in staggered rows on adiabatic film cooling effectiveness of vane suction side
العناوين الأخرى
تأثيرات زوايا الميل و الدوران للثقوب الدائرية في الصفوف المتخالفة على كفاءة التبريد الغشائي لجانب السحب من ريش التوجيه الرئيسية في التوربين
المؤلفون المشاركون
Nasif, Rashid Khalid
Abd Allah, Najdat Nashat
المصدر
العدد
المجلد 22، العدد 6 (30 يونيو/حزيران 2016)، ص ص. 100-116، 17ص.
الناشر
تاريخ النشر
2016-06-30
دولة النشر
العراق
عدد الصفحات
17
التخصصات الرئيسية
الموضوعات
الملخص EN
The aim of this work is oriented to increase film cooling effectiveness value through numerical investigations for flow of Mach number not more than 0.3 around vane surface, to find the effects of inclination and compounds angles of round holes in staggered rows on adiabatic film cooling effectiveness of vane suction side.
Multi cylindrical film cooling hole cases were studied with pitch ratio P/ d =2 and 3, local blowing ratios M = 0.382, 0.77 and 1.14, inclination angles =30° and 45°, compound angles β = 0°, 15°, 30° and 45° and local momentum ratios I = 0.084, 0.34 and 0.756 for better cooling process.
A numerical technique, using ANSYS-FLUENT version 14.5, was used to solve governing partial differential equations of mass, momentum (Navier Stokes equations) and energy conservations in three dimensions with a v^2-f turbulence model that involves the solution of the four transport equations.
Based on the results of the numerical solution, the best film cooling configuration, blowing ratio, with the range of actual engine flow conditions, dimensions and vane geometry; density ratio 1.74 , temperature ratio 0.57 and blowing ratio M =0.382, 0.77 and 1.14 was obtained.
The best case for inclination angle =30°, P / d = 2 was at M =1.14 and β = 0° for the total average effectiveness along 60L/d of surface suction side was 0.616, while the best case for inclination angle = 45°, P / d=2 was at M = 0.382 and β = 30° for the total average effectiveness along 60L/d of surface suction side was 0.516.
In addition, comparisons were performed with available other work, where the experimental total average effectiveness results of Dees et al., 2011 were in good agreements with the numerical results of current work with a maximum deviation of 9.9 % at I = 0.34 and 3.6 % at I = 0.75.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Abd Allah, Najdat Nashat& Nasif, Rashid Khalid. 2016. The effects of inclination and compounds angles of round holes in staggered rows on adiabatic film cooling effectiveness of vane suction side. Journal of Engineering،Vol. 22, no. 6, pp.100-116.
https://search.emarefa.net/detail/BIM-689592
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Abd Allah, Najdat Nashat& Nasif, Rashid Khalid. The effects of inclination and compounds angles of round holes in staggered rows on adiabatic film cooling effectiveness of vane suction side. Journal of Engineering Vol. 22, no. 6 (Jun. 2016), pp.100-116.
https://search.emarefa.net/detail/BIM-689592
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Abd Allah, Najdat Nashat& Nasif, Rashid Khalid. The effects of inclination and compounds angles of round holes in staggered rows on adiabatic film cooling effectiveness of vane suction side. Journal of Engineering. 2016. Vol. 22, no. 6, pp.100-116.
https://search.emarefa.net/detail/BIM-689592
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes appendices : p. 110-116
رقم السجل
BIM-689592
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر